Engine Failure Hazard Renault (Causes & Solution)

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The “Engine Failure Hazard” is a dashboard warning in Renault cars. If you have it on your dashboard, you need to immediately acknowledge it and should not drive the car unless you know what triggered it. From causes to solutions, I have covered everything related to it; make sure you carefully read everything. 


What Does Engine Failure Hazard Mean?

The “Engine Failure Hazard” is a critical warning that appears on Renault car’s dashboard when there is a serious engine-related fault. However, apart from serious issues such as low coolant level, faulty fuel injectors, and low engine oil, the warning can be triggered by some not-so-critical issues like a dying battery, a blown fuse, faulty sensors, and more. 


Engine Failure Hazard Causes in Detail

As I said in the previous section, there are critical and non-critical causes behind the warning. Below, I have covered both types of causes in detail. 

Cause 1) Dying/Dead Battery

A dying or dead battery can cause random warning lights to pop on the dashboard. You can test the battery with a multimeter; if you do not have a multimeter, there are some tests that you can do, but a multimeter is highly recommended for accurate results.

Car batteries usually have a resting voltage between 12.4 and 12.6. If the multimeter reading is below 12 volts, you may have a dying battery. Additionally, it would help if you also inspected the Alternator to make sure it’s charging the battery properly. 

Cause 2) Overheating

Overheating due to issues such as low coolant and radiator issues can trigger the “Engine Failure Hazard.” Pop the hood, check the coolant level, and also look for leaks. If the coolant level is below the required quantity, refuel it, and if you find any leaks, fix them as soon as possible. Low engine oil and oil sludge can also cause this issue. 

Cause 3) Faulty Oxygen Sensor

Oxygen Sensors help with air-fuel mixture for optimal combustion by monitoring the amount of oxygen in your engine’s exhaust. A bad Oxygen sensor can cause an incorrect air-fuel mixture, resulting in the engine running in poor condition, that will lead to engine damage. 

Cause 4) Blown Fuse

A blown fuse can also cause the problem. In some cases, a 15 AMP fuse under the bonnet’s fuse box blew, causing the warning to pop up. Check the owner’s manual for all fuse locations, inspect the fuses, and replace them if you find any blown ones. 

Cause 5) Stucked Thermostat

The thermostat regulates the temperature of the engine. It opens and closes the valve to control the flow of coolant between the engine and the radiator. It’s an important part of the cooling system, and if it gets stuck, it won’t be able to do its job, which is to help maintain the temperature, which eventually leads to overheating. 

Cause 6) Faulty Fuel Injectors

Fuel injectors are crucial parts of a car. As the name suggests, they inject fuel into the intake manifold or port outside the cylinder valve. However, there are other injection types, such as throttle body and direct injection.

Faulty fuel injectors can cause engine issues and will lead to warnings popping up on the dash. You can get an expert to inspect them and replace them if they are not working properly. 

More causes 

  1. Clogged DPF
  2. Bad Spark Plugs
  3. Damaged Wiring
  4. Timing Belt or Chain Failure


How to Fix the Issue?

You can look at the causes I have covered and check those components if you are skilled enough. If you cannot identify and fix the issue, take the help of a local mechanic or visit the official Renault service center. 


Affected Renault Models

While the issue is associated with a lot of Renault cars, some of the most common models are the Renault Megane, Clio, Captur Trafic, Master, Laguna 3 and Scenic.


Can You Drive With the Engine Failure Hazard Warning?

It depends upon what has triggered the warning. If the warning is caused by a direct issue such as overheating, fuel-injector failure, etc, you cannot drive the car since it will cause more damage. 

You can drive the car if the warning is caused by something indirect, such as a blown fuse or wiring issues.

Since you cannot find out the cause instantly, you should not drive the car at all. 


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